What is the underlying physical idea behind the operation of the electron microscope?
A) Radiation has a particle-like behavior--i.e., it acts like it is made of particles.
B) the moon behaves as though it is made of cotton candy.
C) Matter has a wave-like behavior.
D) Matter has a particle-like behavior.
E) Radiation has a wave-like behavior.
C
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A Young's double slit has a slit separation of 1.65 × 10^?5 m on which a monochromatic light beam is directed. The resultant bright fringes on a screen 1.10 m from the double slit are separated by 2.25 × 10^?2 m. What is the wavelength of this beam? (1 nm = 10?9 m)
a. 6.90 nm b. 205 nm c. 337 nm d. 338 nm e. 408 nm
Electric dipoles always consist of two charges that are
A) equal in magnitude; opposite in sign. B) equal in magnitude; both are negative. C) equal in magnitude; both are positive. D) unequal in magnitude; opposite in sign. E) unequal in magnitude; both are negative.
Which of the following has the shortest wavelength, assuming that they all have the same speed?
A) electron B) water molecule C) baseball D) helium atom E) None of these objects have wavelengths of any kind.
When a simple machine multiplies force, it decreases
A) potential energy. B) distance moved. C) both of these D) none of the above